The under story of this is that the City passed the ordinance. When it was challenged, the City changed the ordinance and tried to argue that the case was therefore moot, and should not be heard by the USSC.
The USSC saw through this nonsense and decided to take the case anyway. I think the court will make a narrow decision that people cannot be prohibited from transporting firearms from their homes to other locations. You may be right but I would really, really, really like it if Santa brought us a SCOTUS decision establishing strict scrutiny as the standard for all firearms laws.